Dishwashing machine



May 27, 1969 G. HILLEMAN DISHWASHING MACHINE ors Sheet Filed Jan. 5, 1967 INVENTOR GEORGE L.HILLE-MAN BY @jfg 5y. (Q-4A ATTORNEY May 27, 1969' G. L. HILLEMAN 3,446,219

DISHWASHING MACHINE Filed Jan. 3, 1967 Sheet i of 5 FIG. 3 a

INVENTOR GEORGE L HI LLEMAN BY TN ATTORNEY May-27, 1969 e. HILLEMAN 3,446,219

- DISHWASHING MACHINE Filed Jan. 5, 1967 Sheet Z of 5 INVENTOR GEORGE L. HI LLEMAN BY M w.

ATTORNEY y 7, 1969 G. L. HILLEMAN v 3,446,219

DISHWASHING MACHINE Filed Jan 3, 1967 Sheet 4 of 5 INVENTOR GEORGE L. HI LLEMAN BY QM AW/CM ATTORN EY May 27, 1969 e. HILLEMAN 3, 4

DISHWASHING MACHINE Filed Jan. 5, 1967 Sheet 5 of 5 BY Q N W ATTORNEY United States Patent 3,446,219 DISHWASHING MACHINE George L. Hillernan, St. Louis County, Mo., assignor t0 Vulcan Manufacturing Company, Inc., St. Louis, M0., a corporation of Missouri Filed Jan. 3, 1967, Ser. No. 606,833 Int. Cl. A471 15/23, 15/44 US. Cl. 134-100 11 Claims ABSTRACT OF THE DISCLOSURE BACKGROUND OF THE INVENTION Herertofore various efforts have been undertaken to provide a dishwashing machine incorporating a dish and utensil holding basket adapted for rotation by the force of water impinging thereon. However, with machines of this type there has been the constant problem of assuring that adequate water and detergent are provided to the entire surfaces of the dinnerware being washed. The present invention solves this problem by providing a unique arrangement of spray orifices, so related and so presented so as to assure that the dishes and utensils are entirely cleaned throughout their various surfaces. Furthermore, the present invention provides a unique system for incorporating detergent within the operating area so that a proper amount is continuously presented to the articles being cleaned as well as to obviate the necessity of the operator from an almost incessant refilling operation as has been requisite with structures heretofore known.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a dishwashing machine of the type incorporating a dish and utensil-holding basket adapted for rotation by means of water impinging thereon which comprises unique Water spray means for assuring application of water to all surfaces of the articles being washed.

It is another object of the present invention to provide a dishwashing machine of the character stated which embodies novel spray-deflector means so as to assure that the cleaning spray is properly directed to the articles being treated and not dissipated through inaccurate discharge.

It is a still further object of the present invention to provide a dishwashing machine of the character stated which incorporates a tub for receiving the basket and spray means which embodies recesses for receiving various spray tubes so as to provide maximum operating area for the basket within minimum space.

It is a further object of the present invention to provide a dishwashing machine of the character stated which comprises unique detergent dispensing means, assuring of a proper quantity of detergent within the operating area at all times and which does not require constant replenishing by the operator.

It is a still further object of the present invention to provide a dishwashing machine of the character stated which may be economically produced; which contains a simplicity of parts, being designed for reliable and substantially constant operation, and being resistant to breakdown; which effectively cleanses articles presented thereto; and which may be run at exceedingly low costs.

BRIEF DESCRIPTION OF THE DRAWINGS FIGURE 1 is a top plan view of a dishwashing machine constructed in accordance with and embodying the present invention, illustrating the machine in installed condition and having the cover disposed thereon.

FIGURE 2 is a vertical transverse sectional view taken on the line 22 of FIGURE 1, but with the tub being shown in side elevation.

FIGURE 3 is a top plan view of a dishwashing machine but with the cover removed.

FIGURE 4 is a vertical transverse sectional view taken on the line 4-4 of FIGURE 3.

FIGURE 5 is a vertical transverse sectional view taken on the line 55 of FIGURE 3.

FIGURE 6 is a vertical transverse section taken on the line 66 of FIGURE 5.

FIGURE 7 is a top plan view of the impeller spray head with the deflector cap removed.

FIGURE 8 is a vertical transverse section taken on the line 8-8 of FIGURE 3.

FIGURE 9 is a vertical transverse section taken on the line 99 of FIGURE 3.

FIGURE 10 is a top plan view illustrating the basket in operative position.

FIGURE 11 is a vertical transverse sectional view taken on the line 11-11 of FIGURE 10.

FIGURE 12 is a vertical transverse sectional view taken on the line 1212 of FIGURE 10.

DESCRIPTION OF THE PREFERRED EMBODIMENT Referring now by reference characters to the drawings which illustrate the preferred embodiment of the present invention, A generally designates a dishwashing machine comprising a substantially cylindrical tub or tank 1, formed of any suitable or durable material such as being cast from plastic or other synthetic materials and having a bottom wall 2 and an upstanding side wall 3; said bottom wall 2 being provided with an eccentrically located drain outlet 4 toward which said bottom wall is inclined. Drain outlet 4 is provided with a strainer 5 and is connected by a suitable fitting 6 to a discharge pipe 7 which may also serve as a support for tu b 1. Side Wall 3 is provided with a plurality of circumferentially spaced vertical recesses 8, 8', and 8" extending from bottom Wall 2 to the upper margin of said side wall 3 and being transversely inwardly concave and outwardly convex. Said recesses 8 primarily serve as receptacles for pipes in a manner to be discussed more fully hereinbelow and secondarily act as reinforcing ribs for tub 1. It is apparent that any number of such recesses 8 may be formed in tub 1 but in the construction shown in the drawings, for exemplary purposes, three such recesses are illustrated with the same being located at intervals. In its upper portion side wall 3 is diametrally increased to form a shoulder 9 for receiving the .bottom edge of a removable cover 10; said cover being centrally provided with a handle portion 11. At its upper extremity side wall 3 is turned outwardly to present a mounting flange 12 for appropriate connection to the adjacent portions of a conventional counter top 13, as normally provided in kitchen areas; said counter top having an opening 14 of slightly greater diameter than that of flange 12 for facile reception of dishwashing machine therein so as to present flange 12 in planar alignment with the upper surface of counter top 13. Any conventional means for securing flange 12 to counter top 13 may be utilized, such as, for example only, a plurality of adjustable clamps as indicated broadly at 15, which latter do not form a part of the present invention. For finishing the appearance of the installed dishwashing machine A, an annular trim member 16 may be provided for appropriately covering the annular space between flange 12 and the adjacent edge of counter top 13; said trim member may be of stainless steel and, if desired, transversely arcuate.

Provided in said bottom wall 2, at the lower end of each recess 8, 8' and 8" is an aperture 17. Within aperture 17 at the lower end of recess 8, there is secured a pipe fitting 18 having a bore 19 for communication with a water feed pipe 20 suitably secured to said fitting 18 by a cooperative fitting 21. Water feed pipe 20' is suitably connected at its other end to a water supply pipe 22 through a T -fitting 23 which accommodates a flow control valve (not shown) suitably connected to a handle 24 presented upwardly of counter top 13 for facile manipulation.

Secured in the upper end of fitting 18, for reception within recess 8 is a vertically extending spray pipe 25 having on its inwardly directed side face a plurality of vertically spaced orifices 26; the upper end of said pipe 25 being sealed and provided with an off-set flange 27 for securement, as by a bolt 28, to side wall 3 of tube 1 immediately below shoulder 9. With reference to FIG- URE 4 it Will 'be seen that pipe 25 projects slightly beyond recess 8 so as to permit water directed through orifices 26 to be delivered within the interior of tu'b 1; said orifices 26 being presented so that water emitted therethrough will be directed along a chordwise path rather than directly toward the center of tub I for purposes presently appearing. Upwardly of the upper end of pipe 25 there is mounted a deflector head 29 comprising a side wall portion 30 having an opening for receiving bolt 28 for securement of said head in position and a top wall 31 extending inwardly of tub 1 for deflecting any spray received thereagainst downwardly, thus preventing undesired spray flow through the upper end of recess 8.

Pipe fitting 18, immediately above bottom wall 2, is provided on its inwardly presented side with a lateral opening 32, communiacting with bore 19 in axial normal relationship thereto; said opening 32 being adapted to fittedly receive one end of a pipe 33 which extends radially from said fitting 18 toward the center of tub 1 for securement at its other end within a passage 34 of a threeway connector 35 having a web portion 36 which is secured as by screws 37 to the central portion of bottom wall 2 which is slightly elevated as at 38 so as to allow liquid flow between said pipe 33 and bottom wall 2. Pipe 33 is also provided with a plurality of orifices 39 which are presented along the upper side portion thereof. Connector 35 includes passages 34' and 34" with the axes of the three passages of said connector 35 forming an angle of 120 with that of the adjacent passages so that the same are directed toward recesses 8, 8 and 8", respectively. Secured within passage 34' is the inner end of a pipe 40 (FIGURE 4), the outer end of which is secured within a plug-type fitting 41 suitably fixed within opening 17 at the lower end of recess 8'; said fitting 41 having an upwardly opening bore 42 for communicating with the outer end of pipe 40 and for receiving at its upper portion a vertically extending spray pipe 43 being in all respects structurally identical to spray pipe 25 above described and having a plurality of vertically spaced orifices 44 which are directed in the same manner as orifices 26 of pipe 25, that is, toward the adjacent portion of side 'wall 3 so that water emitted therethrough will be in a general clockwise direction, as indicated by arrows in FIGURE 3. A deflector head 29 is also secured at the upper end of pipe 43 for spray directing purposes. Pipe 40 also includes a plurality of orifices 45 directed upwardly.

Secured in passage 34" of connector 35 is a pipe 46 which progresses above bottom wall 2 for reception within a lateral opening 47 in a plug-type fitting 48 fixed in aperture 17 at the lower end of recess 18". Fitting 48 is surrounded by the lower end of a detergent pipe 49 being of relatively increased diameter with respect to spray pipes 25, 43 and having an opening 50 for extension therethrough of the outer end of pipe 46. Said fitting 48, within detergent pipe 49, is provided with an upwardly opening bore 51 for connection with lateral opening 47 and for communication at its upper end with the interior of detergent pipe 49. Said pipe 46 is provided on its upper surface with a plurality of horizontally spaced orifices 46' for directing flow therethrough upwardly. Provided within pipe 46 is a water intake pipe 52 which at its outer end has an outer diameter of substantially the same as the inner diameter of pipe 46 so as to provide a snug leakproof joint therewith, as at 53, so that water entering said pipe 52 at its inner end will not inadvertently seep into pipe 46. For substantially the length of pipe 46, water intake pipe 52 is of relatively decreased diameter as indicated at 54 so as to provide spacing between same and the upper outer wall of pipe 46, such volume being designated 55 for purposes presently appearing. The outer end of water intake pipe 52 progresses through the outer end of pipe 46 for projection into bore 51 whereat said pipe 52 is upwardly turned, as at 56, with the end extremity thereof extending into the lower end portion of detergent pipe 49 upwardly of the upper end of fitting 48 as at 57. It is to be seen that the diameter of the outer end of pipe 52 is such as to allow flow about same through bore 48 and into volume 55 within pipe 46. At its upper end, detergent pipe 49 is diametrally enlarged to provide a chamber 58; there being aligned openings, as at 59, in opposing wall portions thereof for extension thereacross of a screw 60, the outer end of which progresses through an opening (not shown) in the side wall portion of recess 8" for receiving a nut 61 whereby detergent pipe 49 is rendered stable. Mounted upon screw 60 within detergent pipe 49 is a sleeve 62 which constitutes a locking bar for reception within bayonet slats 63 formed in the depending skirt '64 of a closure member 65 having a finger gripping tab 66 projecting from its upper surface. Thus, by appropriate manipulation, closure member 65 may be rotated into unlocked position for facile upward withdrawal so as to permit recharging of detergent pipe 49 with detergent and thereupon by reverse rotation effecting secure locking of the same to avoid any accidental displacement during operation under pressure of water entering said pipe 49.

Connector 35 incorporates a vertical bore 67 which communicates at its lower end with the inner ends, or point of confluence, of horizontal passages 34, 34, 34" and fixedly receives the lower end of an upstanding pipe 68 which terminates at its upper end slightly below the upper ends of spray pipes 25, 43, and has fixed in its upper end a nozzle '69 with a rounded head 70. Disposed in surrounding relationship to said pipe 68 is a tube 71, being of greater diameter than said pipe 68 so as to provide an intervening annular space 72 therebetween. The lower end of said tube 71 is flared outwardly as at 73 to provide a bearing surface for engaging a flat annular shoulder 74 formed with connector 35. Said tube 71 at its upper and extends beyond the upper end of pipe 68 and is internally threaded as at 75 for engaging the externally threaded lower end of a fitting 76 having a head 77, as of hexagonal contour, for seated disposition upon the upper end margin of tube 71; said fitting 76 incorporating an elongated extension 78 progressing upwardly of head 77, being of circular cross section and of relatively reduced diameter with respect to the threaded portion of said fitting 76. At its lower end fitting 76 is contoured to provide a concave recess 79 for receiving the rounded upper end of nozzle 69 and with said recess opening centrally into the lower end of a bore 80 which progresses upwardly through fitting 76 for termination immediately below the upper end of said extension 78, as at 81; said bore 80 being of substantially like diameter as the bore in nozzle 69 for providing a continuation thereof. Said extension 78 is received within the bore of an impeller 82 which incorporates a generally cylindrical body portion 83 and a pair of diametrally aligned, outwardly extending spray arms 84, 84', each of which incorporate in their downwardly directed surface, a plurality of outlets 85. Additionally, each spray arm 84, 84' is provided proximate its outer end and on opposite sides, an orifice 86, 86 for purposes presently appearing. Said extension 78 is provided with lateral openings, as at 87, 87' for establishing communication between bore 80 and the interior of spray arms 84, 84', respectively. Extension 78 projects upwardly of body 83 of impeller 82 and in such projecting portion is provided with an annular groove 88 for receiving a generally U-shaped locking member 89 for preventing inadvertent disengagment of impeller 82 from said extension 78. The fit of extension 78 within impeller 82 is such as to allow the latter to rotate thereabout through jet action of water sprayed through openings 86, 86' under which rotative action the water emitted downwardly through outlets '85 will provide a continual spray through an arc of 360 for purposes to be discussed hereinbelow.

Enclosingly disposed upon the upper end of extension 78 and the proximate upper portion of body 83 of impeller 82 is the crown 90 of a deflector cap 91, as fabricated of plastic, and having a flat, horizontally disposed annular flange 92 with downwardly concave recesses 93 for receiving the upper portions of spray arms 84, 84'. Crown 90 is provided with a vent a for relief of air pressure during operation. Openings 86, 86 are so presented as to cause impeller 82, with deflector cap 91 engaged thereon, to rotate in a counterclockwise manner for purposes described hereinbelow.

Referring now to FIGURES 10, 11 and 12, D generally designates a dish and utensil-holding basket, being of cylindrical character and of wire/rod construction and having a central bearing sleeve 94 comprising a top ring 95 disposed encirclingly of, and radially spaced from, tube 71 substantially intermediate the height thereof; there being secured, as by welding, to said ring 95 a plurality of vertically extending members 96 which, being of rod stock, on their inner surfaces, abut against the outer face of tube 71 to form a friction joint therewith whereby, as will be seen, basket D and tube 71 will unitarily rotate about pipe 68. At their lower ends, members 96 are bent perpendicularly outwardly, slightly above the flared lower end 73 of tube 71, to constitute radial main rods or arms 97 which, at their outer ends, spacedly from the inner face of side wall 3 of tub 1, are bent normally upwardly, as at 98, to form outer sections 99, the upper ends of which terminate in substantial alignment with ring 95. Said rods 97 are angularly spaced atsubstantially 90 intervals so as to provide a stable frame for basket D. Secured to outer sections 99 of said rods 97, as by welding, or the like, is a plurality of vertically spaced apart bands 100 which thus define the outer limit of basket D. Fixed to the under surface of rods 97 between vertically extending members 96 and the outer portions 99 thereof, is a plurality of concentric annuli, understandably of increasing diameter, indicated at 101, 102, 103 and 104 and being also of rod stock, for stabilizing the base of said basket D. With reference to FIGURE 10, it will be seen that rods 97 divide basket D into four equal portions or quadrants, defined by adjacent rods 97 with each such quadrant being of like construction. Thus, with reference to the quadrant indicated at C, the construction thereof may be described with recognition that the other three quadrants are of identical construction. Centrally of quadrant C, intermediate the defining rods 97, there is presented a dish retaining member indicated 105, the base of which may be formed from a single length of rod stock to define a V-shape with the apex located between the inner ends of adjacent rods 97 and the legs 106, 106' of which diverge radially outwardly being secured, as by welding, on their under surface to concentric annuli 101, 102, 103 and 104; which legs, at their outer ends beyond annuli 104, are turned upwardly, as at 107, to provide outer ends -108 which are of like height as outer sections 99 of rods 97 and are secured on their outwardly directed faces to each of said bands 100. Rigid with legs 106, 106' are the lower ends of the arms 109 of a plurality of U- shaped members 110, 111, 112, 113 and 114 which are in radially spaced-apart relationship and of increasing height progressing from the inner portion of basket D so that member 114 will be of the greatest height in the said series. Said members 11 1, 112, 113 and 114 at their upper ends are bent downwardly and outwardly as at 115 so as to serve as spacers for maintaining plates received in upright position between adjacent members against damaging contact.

There is provided for enhancing the stability of basket D a plurality of relatively short rods 116 which are radially presented and welded or otherwise fixed to the upper surfaces of annuli 102, 103 and 104 intermediate rod 97 and the proximate legs 106, 106', as the case may be, of the immediately two adjacent dish retaining members 105.

One of the rods 97 which defines the above described quadrant C may be, as it were, cut-away so that the ends thereof may be rigidly secured to diametrally opposed portions of a small circular rod 117 being also joined to broken away ends of annulus -103, as at 118, 118' for forming a part of the base of said basket D and providing a circular opening therethroughout. Fixed on the uppermost band 100, upwardly of circular rod 117, is a support 119 for engaging a transverse member 120 of a utensil retainer, indicated generally at 121 (see FIGURE 11). As may best be seen in FIGURES 10 and 11, utensil retainer -121 is of trapezoidal configuration in cross section having top, intermediate and bottom frame members 122, 123, 124, respectively, being in vertically spaced relationship and incorporating outward transverse portions 125, 120 and 126, respectively; there being a plurality of separators 128, 129 extending transversely across top and intermediate frame members 122, 123, respectively, for providing suitable compartmentation for accommodation of spoons, forks and knives. The lower portion of utensil retainer 121 is provided with a plurality of closely intersecting rod members, as at 130, for preventing displacement of received utensils during operation of machine A. It will be seen that utensil retainer 121 is readily detachable by the mere act of lifting same upwardly from support 119 so that said retainer 121 may be optionally used if desired. Furthermore, the opening therebelow developed by circular rod 117 provides a suitable drain opening for utensils received within retainer 121.

There is also provided for disposition upon basket D a drinking vessel support designated 131 (see FIGURE 12) which incorporates a continuous support ring 132 of rod stock, being of substantially the same diameter as bands 100, for reception upon the uppermost of said bands. Spaced at predetermined intervals about said support ring 132 for presentation radially inwardly thereof, is a plurality of vessel-receiving members 133 which project upwardly of said support 132 so that during operation of machine A the drinking vessels received thereon will be presented spacedly from dishes within basket D for receiving cleansing liquid and detergent in an unimpeded manner. Each member 133 may be formed of a single length of rod or wire stock with the outer end being fixed to support 132 and extending slightly downwardly therefrom as at 134 and then being turned upwardly as at 135 in loop formation; said member 133 progresses in an upwardly slightly curvate manner to a point spacedly above support 132 and thence extends directly upwardly to define one leg 136 of a U-shaped portion 137, the other leg of which extends downwardly and thence upwardly at its inner end in book forming relation as at 138 which latter may be utilized for supporting a cup and with the U- shaped portion 137 as being adapted for extension into an inverted drinking vessel for engaging the normally lower face thereof whereby said vessels will be presented in downwardly opening condition for facilitating the washing operation.

From the foregoing, the operation of machine A should be apparent. But as will be shown hereinbelow, the same is so contrived as to allow for the completion in an automatic fashion of the entire requisite dishwashing cycle. With basket D properly supporting soiled dishes and drinking cups and/or glasses disposed in inverted position upon support 131, the operator will dispose cover in tub-enclosing condition (FIGURE 2) and handle 24 will be turned so as to permit flow of water from supply pipe 22 through intake pipe 20. The pressure of the water will cause same to flow upwardly into spray pipe 25, as well as along pipe 33 for distribution thence into pipes 40 and 52. From the pipe 40, water will flow upwardly into vertical spray pipe 43 and with water in the same and in pipe 25 being sprayed outwardly through orifices 44 and 26, respectively, for impingement against the plates Within basket D which latter act as vanes so that the force of the spray will cause basket D to be rotated in a clockwise direction, along the particular path established by the arrows in FIGURE 3. Central pipe 68 thus serves as a hub about which tube 71 and the engaged basket D freely rotate with the continuing spray serving as the motivating force. In addition to providing a driving pressure for basket D, the spray discharged through orifices 44, 26 also provides a widely spread cleansing stream for removal of food particles from the soiled dishes as well as continuously washing the surfaces thereof. Water within pipes 33 and 40 will also be discharged directly upwardly into the rotating mass of articles to be cleaned with such emitted liquid being in spray form so as to cover a relatively wide area through which the basket D is continually moving.

It will also be seen that due to the pressure of the water the same will be forced upwardly through pipe 68 and into impeller head 82 for discharge downwardly, in spray form, from outlets 85 in spray arms 84, 84' thereby presenting a downwardly directed shower upon the contents of revolving basket D. By virtue of jet action, said impeller head 82 will be rotated upon the discharge of liquid through openings 86, 86' and thereby assuring proper distribution of the cleansing water. Deflector heads 29 and deflector cap 91 serve to effectively inhibit wasteful flow so that all discharged water is directed downwardly for effective usage. It will, therefore, be seen that the present invention constitutes a most unique spray system so that the articles to be cleaned are subjected to the cleaning fluid from substantially all directions whereby no portions of such articles are inadvertently left in an uncleaned state by reason of inadequate spray distribution.

In this connection, it is to be particularly noted that recesses S, 8' and 8" permit of a commensurate recessing of the pipes therein, 25, 43, 49, respectively, so that the effective operating volume of tub I is not reduced by undesired projection of said pipes within the inner basket receiving zone thereof.

By this novel recessing, the present critical spray system may be provided without sacrifice of basket size or without requiring costly enlarged tubs with corresponding installation requirements.

In addition to being subjected to an all-around water flow, the dinnerware within basket D is also subjected to detergent washing action by reason of the following: The operator will have removed closure 65 and filled pipe 49 with the desired dishwashing detergent. Closure 65 is then located in closed condition and with water flowing through pipe 52 the same will be discharged into pipe 49 and by the pressure of such water will be driven upwardly within such pipe for mixing with the detergent and placing same in solution. Under the water pressure such solution will fiow outwardly into spacing 55 for ejection through openings 46' of pipe 46. By reason of the Snug joint 53 no detergent solution will inadvertently flow into passage 34' and thereby prevent any premature mixing action. It will thus be seen that the pressure of the water, or the head thereof, delivers water to pipe 49 and also serves to force the dissolved detergent through openings 46'. Thus, as basket D rotates there will be a continuous spraying upwardly of the detergent solution to thereby accord each of the articles with the requisite washing action. Detergent tube 49 is of such dimension that it may receive, at the election of the user, a predeter-mined quantity of detergent which will be adequate to effect a washing action for a predetermined time interval.

In view of the foregoing, it will be seen that machine A is conducive to a preselected cyclic action. With detergent pipe 49 empty, water may be in turn on condition so as to permit a prerinsing of the rotated dinnerware and upon completion of such prerinsing, the desired amount of detergent may be charged to pipe 49. A detergent dissolving action will then occur with cleaning of the dinnerware and upon exhaustion of the detergent the machine may be allowed to continue to run to allow a final rinsing, for removing any remaining particles. After final rinsing, handle 24 may be operated for shutting off the water supply and the dinnerware may be dried by manual spinning of the basket D.

As indicated hereinabove, basket D rotates in a clock wise direction, while impeller 82 is caused, through jet action, to be rotated in the opposite, or counterclockwise direction. By this unique relationship water emitted through outlets 85 is being directed against the dinnerware moving oppositely thereto so as to bring about a positive impinging action for effective cleaning.

It should be understood that changes and modifica tions in the formation, construction, arrangement, and combination of the several parts of the dishwashing machine may be made and substituted for these herein shown and described without departing from the nature and principle of my invention.

Having thus described my invention, what I claim and desire to obtain by Letters Patent is:

1. A dishwashing machine comprising means defining a tub, a receptable disposed within said tub and being adapted to receive articles to be washed, a bearing member mounted for rotation within said tub, said receptacle being mounted on said bearing member for rotation therewith, a plurality of first spray pipes vertically presented within said tub radially beyond the path of rotation of said receptacle, said first spray pipes having orifices for emission of fiuid for impingement upon articles in said receptacle for effecting rotation thereof, a plurality of second spray pipes provided in said tub being horizontally presented beneath said receptacle, said second spray pipes having orifices, a connector located centrally of said tub and having passages for receiving the inner ends of each of said second spray pipes for extension of the latter radially from said connector, said second spray pipes being connected at their outer ends to the related first 'spr'ay pipes, means for providing water to said first and second spray pipes, a vertically presented detergent pipe axially parallel to said first spray pipes, means connecting the lower end of said detergent pipe with the outer end of one of said second spray pipes, there being :an inner tube within said connected spray pipe over relatively reduced diameter for creating a spacing between said inner tube and the surrounding second spray pipe, said inner tube extending as its outer end within the lower end of said detergent pipe for delivering water thereto for effecting solution of detergent within said pipe, and passage forming means for directing said dissolved detergent into said spacing for emission through the orifices of said second spray pipe. 7

2. A dishwashing machine :as defined in claim 1 and further characterized by removable closure means for the upper end of said detergent pipe, there being a leakproof ioint between the inner end of said inner tube and the related second spray pipe to prevent flow into said latter of water through said connector.

3. A dishwashing machine comprising means defining a tub, a receptacle disposed within said tub and being adapted to receive articles to be washed, a bearing member mounted for rotation within said tub, said receptacle being mounted on said bearing member for rotation therewith, a plurality of first spray pipes vertically presented within said tub radially beyond the path of rotation of said receptacle, said pipes having orifices for emission of fiuid for impingement upon articles in said receptacle for effecting rotation thereof, .a plurality of second spray pipes provided in said tub being horizontally presented beneath the said receptacle, a connector located centrally of said tub and having passages for receiving the inner ends of each of said second spray pipes for extension of the latter radially from said connector, said second spray pipes being connected at their outer end-s to the related first spray pipe, means for providing water to said spray pipes, a vertical pipe progressing upwardly from said connector and being in communication with the latter for flow into said vertical pipe, said bearing member being disposed encirclingly of said vertical pipe, and an impeller head carried on said bearing member upwardly of the upper end of said vertical pipe, said impeller head being in communication with said vertical pipe for reception of flow therein.

4. A dishwashing machine as defined in claim 3 and further characterized by said impeller head being adapted for rotation about an axis aligned with that of said vertical pipe, said impeller head having a pair of di-ame't-rally opposed laterally extending spray arms, each of said spray arms having a plurality of fluid outlets in its under surface for directing fluid onto the articles in said re ceptacles, and a deflector mounted on the upper end of said impeller head and having a circular deflecting surface-forming member presented upwardly of said impeller arms for assuring downward how of emitted fluid.

5. A dishwashing machine as defined in claim 4 and further characterized by means for rotating said impeller head in a direction opposite to the direction of rotation of the receptacle.

6. A dishwashing machine comprising [means defining a tub, means defining an article-receiving receptacle provided in said tub, means adapting said receptacle for rotation, a plurality of first spray pipes vertically presented within said tub beyond the path of rotation of said receptacle means, a plurality of second spray pipes provided in said tub horizontally beneath said receptacle means, connector means engaging the inner ends of said second spray pipes, said second spray pipes being connected at their outer ends to a related first spray pipe, a vertically presented detergent pipe provided within said tu'b, means connecting the lower end of said detergent pipe with the outer end of one of said second spray pipes, there being an inner tubular member within said last mentioned second spray pipe having a relatively reduced diameter for creating a spacing between said inner tubular memher and the surrounding second spray pipe, said inner tubular member extending at its outer end within the lower end of said detergent pipe and being in communication at its inner end with said connector means and 10 means for directing dissolved detergent into said spacing. 7. A dishwashing machine as defined in claim 6 and further characterized by removable closure means upon the upper end portion of said detergent pipe, and leakproof joint means between the inner end of the said inner tubular member and the related second spray pipe.

8. A dishwashing machine comprising means defining a tub, a receptacle disposed within said tub and being adapted to receive articles to be washed, a bearing member mounted for rotation within said tub, said receptacle being mounted on said bearing member for rotation therewith, a plurality of first spray pipes vertically presented within said tub radially beyond the path of rotation of said receptacle, said first spray pipes having orifices for emission of fluid for impingement upon articles of said receptacle for efiecting rotation thereof, a plurality of second spray pipes provided in said tub being horizontally presented beneath the said receptacle, connector means located centrally of said tub and having passages for receiving the inner ends of each of said second spray pipes for extension of the latter radially from said connector, said second spray pipes being connected at their outer ends to the related first spray pipes, a vertical pipe progressing upwardly from said connector means and being in communication with the latter for flow into said vertical pipe, said bearing member being disposed encirclingly of said vertical pipe, an impeller head carried on said bearing member upwardly of the upper end of said vertical pipe, said impeller head being in communication with said vertical pipe for reception of flow therein.

9. A dishwashing machine as defined in claim 8 and further characterized by said impeller head being adapted for rotation about an axis aligned with said vertical pipe, said impeller head having a pair of diametrically opposed laterally extending spray arms, each of said spray arms having a plurality of fluid outlets for directing fluid onto the articles in said receptacle.

10. A dishwashing machine as defined in claim 9 and further characterized by said fluid outlets being located on the undersurface of each of said spray arms, each spray arm having an orifice provided adjacent its outer end on opposite sides in normal relationship to said fluid outlets whereby when water is emitted from said orifices said impeller head will be rotated in a direction opposite to the direction of rotation of said receptacle.

11. A dishwashing machine as defined in claim 8 and further characterized by means for rotating said impeller head in a direction opposite to the direction of rotation of the receptacle.

References Cited UNITED STATES PATENTS 1,511,661 10/1924 Dantzebecher 134176 XR 1,665,423 4/1928 Skelton 134138 2,039,362 5/1936 Tafel 134-439 XR 2,702,558 2/1955 Blanchard 134-138 2,712,826 7/1955 Schleyer et al. 134-439 3,144,034 8/1964 Lyman et al 134-176 ROBERT L. BLEUTGE, Primary Examiner.

US. Cl. X.R. 

